RFID underground leaking stoppage equipment with high recognition rate
By using non-metallic spiral pipes and waterproof motor-controlled valve structures in downhole leak plugging equipment, the problem of low signal recognition rate in the mud is solved, and the efficiency of downhole leak plugging operation and the waterproofness of the equipment is improved.
Patent Information
- Application Number
- CN202411388544.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2024-12-27
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing downhole leak plugging equipment, when RFID tags move in mud under high-speed flow, the signal recognition rate is low, which is easily absorbed by fluid or reflected by metal drill barrels, resulting in signal loss, and the recognition rate is not high.
An RFID downhole leak plugging device including drilling barrel, spiral tube and valve is designed. The spiral tube is made of non-metallic material. The spiral tube moves the spiral trajectory of the spiral tube to extend the residence time of the RFID tag within the electromagnetic induction range of the RFID antenna and passes through the PLC. The control panel and motor control valves open and close to prevent mud from damaging the motor.
The signal recognition rate of RFID tags is improved, the impact of metal materials on the signal is reduced, the waterproofness of the motor is ensured, and efficient leakage plugging operation is achieved.
Smart Images
Figure CN119195752A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of underground leak plugging equipment, and in particular relates to an RFID underground leak plugging equipment with a high recognition rate. Background Art
[0002] RFID (Radio Frequency Identification), also known as wireless radio frequency identification, is an automatic identification technology that integrates computer, radio and communication technologies. It is mainly composed of a transmitting identification system and an electronic tag. The transmitting identification system is responsible for sending and receiving signals, and the electronic tag is used as a beacon.
[0003] RFID is currently a special technology of Weatherford in the field of oil well tools, which can realize wireless transmission of ground commands, greatly improve work efficiency, simplify processes and save costs. In addition to Jet Stream circulating bypass valve, this technology is also widely used in RipTide reamer, AutoFrac production stimulation system, I-Stim production stimulation sleeve, Annular safety valve, CrossStream reverse cementing system, TRIP completion system, OptiPkr packer, OptiROSS sleeve, etc.
[0004] In the existing downhole plugging equipment equipped with RFID technology, there is still a problem that the RFID moves in the high-speed flowing mud, resulting in the RFID antenna being unable to capture the signal emitted by the RFID tag. Now there is a need for an RFID downhole plugging equipment that can achieve a high recognition rate. Summary of the invention
[0005] In view of the problem of low recognition rate of RFID tags in the prior art, the present invention provides an RFID downhole plugging device with high recognition rate, the purpose of which is to improve the recognition rate of RFID tags in the process of drilling plugging.
[0006] The technical solution adopted by the present invention is as follows: A high recognition rate RFID underground leak plugging device, comprising: Drill barrel: a cavity is provided inside the drill barrel, a tag channel is provided inside the cavity, a spiral tube is provided at the lower end of the tag channel, an RFID antenna is provided in the middle of the spiral tube, and an outlet end of the tag channel is connected to the interior of the drill barrel; The RFID antenna is connected to a reader / writer, the reader / writer is connected to a PLC control board, and the PLC control board is connected to a side-pass valve and a vertical valve.
[0007] By adopting the above scheme, after the RFID tag is dropped, the RFID moves downward along the tag channel in the drill barrel, and when passing through the spiral tube, it can move downward in a spiral along the trajectory of the spiral tube. During the movement of the spiral trajectory, it can be verified that the signal interaction is carried out within the range of the electromagnetic induction of the RFID antenna, thereby improving the signal recognition rate of the RFID tag, and avoiding the problem of low RFID tag signal recognition rate caused by the signals received and sent by the RFID tag being absorbed by the fluid, moving too fast in the drill barrel, and being reflected by the metal drill barrel in the traditional technology. The PLC control board can receive the signal of the reader and writer, and control the vertical valve and the side-pass valve in the drill barrel to realize the opening and closing of the side-pass and the straight-pass.
[0008] The spiral tube is made of non-metal material.
[0009] The spiral tube does not need to withstand the pressure of high-speed mud, so a non-metallic spiral tube is used. This solution can avoid the influence of metal materials on RFID tag signals and reduce the weight of the spiral tube.
[0010] The spiral tube is formed by bending a hollow tube.
[0011] The side-pass valve and the vertical valve both include: Waterproof box: a motor is fixedly arranged inside the waterproof box, and a valve plate is fixedly arranged on the output shaft of the motor; A water-isolating ring is fixedly arranged at the connection between the output shaft of the motor and the waterproof box.
[0012] By adopting the above scheme, the opening and closing of the side valve and the vertical valve can be controlled by the motor, wherein the waterproof box can prevent the mud in the drill tube from damaging the motor inside it, which is specifically achieved through the waterproof ring at the connection between the motor output shaft and the waterproof box. In this structure, the output shaft contacts and rubs against the waterproof ring during operation, and blocks the mud from entering the waterproof box under the action of compression.
[0013] A mounting plate is fixedly arranged on the top of the waterproof box, one end of the mounting plate is fixedly arranged on the top of the waterproof box, and the other end is fixedly arranged on the side of the lock unit.
[0014] The material of the water-isolating ring is rubber.
[0015] The waterproof box is made of 304 stainless steel.
[0016] The motor is a stepping motor.
[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. After dropping the RFID tag, the RFID moves downward along the tag channel in the drill barrel. When passing through the spiral tube, it can move downward in a spiral along the trajectory of the spiral tube. During the movement of the spiral trajectory, it can be verified that the signal interaction is carried out within the range of the electromagnetic induction of the RFID antenna, thereby improving the signal recognition rate of the RFID tag and avoiding the problem of low RFID tag signal recognition rate caused by the signals received and sent by the RFID tag being absorbed by the fluid, moving too fast in the drill barrel, and being reflected by the metal drill barrel in the traditional technology. The PLC control board can receive the signal of the reader and writer, and control the vertical valve and side-pass valve in the drill barrel to realize the opening and closing of the side-pass and straight-pass.
[0018] 2. Since the spiral tube does not need to withstand the pressure of high-speed mud, a non-metallic spiral tube is used. This solution can avoid the influence of metal materials on RFID tag signals and reduce the weight of the spiral tube.
[0019] 3. The opening and closing of the side valve and the vertical valve can be controlled by a motor, wherein the waterproof box can prevent the mud in the drill tube from damaging the motor inside it, which is specifically achieved through a water-blocking ring at the connection between the motor output shaft and the waterproof box. In this structure, the output shaft contacts and rubs against the water-blocking ring during operation, and blocks the mud from entering the waterproof box under the action of compression. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention will now be described by way of example with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the internal structure of an embodiment of the present invention; Figure 2 It is a schematic diagram of the motor structure of an embodiment of the present invention.
[0021] Figure numerals: 1-tag channel; 2-antenna; 3-reader / writer; 4-PLC control board; 5-side-pass valve; 6-straight-pass valve; 7-spiral tube; 8-water outlet pipe; 9-cavity; 10-drill barrel; 11-waterproof box; 12-motor; 13-mounting plate; 14-output shaft; 15-waterproof ring. DETAILED DESCRIPTION
[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0023] Combine the following Figure 1-Figure 2 The present invention is described in detail.
[0024] A high recognition rate RFID underground leak plugging device, comprising: Drill barrel 10: a cavity 9 is provided inside the drill barrel 10, a tag channel 1 is provided inside the cavity 9, a spiral tube 7 is provided at the lower end of the tag channel 1, an RFID antenna 2 is provided in the middle of the spiral tube 7, and an outlet end of the tag channel 1 is connected to the interior of the drill barrel 10; The RFID antenna 2 is connected to a reader / writer 3 , the reader / writer 3 is connected to a PLC control board 4 , and the PLC control board 4 is connected to a side-pass valve 5 and a vertical valve 6 .
[0025] The spiral tube 7 is made of non-metal material.
[0026] The spiral tube 7 is formed by bending a hollow tube.
[0027] The side-pass valve 5 and the vertical valve 6 both include: Waterproof box 11: A motor 12 is fixedly disposed inside the waterproof box 11, and a valve plate 16 is fixedly disposed on an output shaft 14 of the motor 12; A water-blocking ring 15 is fixedly provided at the connection between the output shaft 14 of the motor 12 and the waterproof box 11 .
[0028] A mounting plate 13 is fixedly disposed on the top of the waterproof box 11 , one end of the mounting plate 13 is fixedly disposed on the top of the waterproof box 11 , and the other end is fixedly disposed on the side of the lock unit 12 .
[0029] The material of the water-isolating ring 15 is rubber.
[0030] The waterproof box 11 is made of 304 stainless steel.
[0031] The motor 12 is a stepping motor.
[0032] In the above embodiment, the spiral tube 7 is mainly used to increase the residence time of the RFID tag within the radiation range of the RFID antenna. The specific structure is as follows: Figure 1 As shown, an RFID channel 1 dedicated to the passage of RFID tags is provided inside the drill tube 10, and a spiral tube 7 is fixedly connected at the outlet of the RFID channel 1, wherein the structure of the spiral tube 7 is as shown in FIG. Figure 1 As shown, after the RFID tag is put into the RFID channel 1, it moves down to the spiral tube 7 under the action of gravity and enters the radiation range of the RFID antenna. During the movement of the RFID tag along the trajectory of the spiral tube 7, it can ensure that the RFID tag and the RFID antenna 2 complete the interaction. After the RFID tag passes through the spiral tube 7, it can pass into the drill pipe along the second half of the spiral tube 7 and be mixed with mud and discharged from the drill pipe. In this way, the RFID tag can be prevented from being trapped inside the drill pipe, and the effect of opening and closing the plugging device an unlimited number of times can be achieved. The outlet of the spiral tube 7 is connected to a water outlet pipe 8.
[0033] Further, in this embodiment, the side valve 5 and the vertical valve 6 are controlled by the PLC control board 4, wherein the reader 3 receives the radio frequency signal, converts the radio frequency signal into an electrical signal and outputs it to the PLC control board 4, and the PLC control board 4 sends an opening and closing control signal to the side valve 5 and the vertical valve 6 according to the signal, wherein the side valve 5 and the vertical valve 6 both include a motor 2, and in this embodiment, the motor 2 adopts a stepping motor; wherein a waterproof box 11 is arranged outside the motor 2 to prevent mud from flowing into the motor 2 and causing damage to the motor 2, wherein a rubber waterproof ring 15 is fixedly arranged at the connection between the output shaft 14 of the motor 2 and the waterproof box 11, and the waterproof ring 15 can press the output shaft 14 inward to prevent mud from flowing in while rubbing against the output shaft 14 of the motor 2, thereby ensuring the dryness of the inside of the waterproof box. It should be noted that the technology and principle of the PLC control board 4 to control the opening and closing of the valve are common knowledge of those skilled in the art, and are not the innovation of the present invention, and will not be elaborated in detail here.
[0034] The above-mentioned embodiments only express the specific implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the protection scope of the present application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the technical solution concept of the present application, and these all belong to the protection scope of the present application.
Claims
1. A high recognition rate RFID underground leak plugging equipment, characterized in that: include: A drill barrel (10): a cavity (9) is provided inside the drill barrel (10), a tag channel (1) is provided inside the cavity (9), a spiral tube (7) is provided at the lower end of the tag channel (1), an RFID antenna (2) is provided in the middle of the spiral tube (7), and an outlet end of the tag channel (1) is connected to the interior of the drill barrel (10); The RFID antenna (2) is connected to a reader / writer (3), the reader / writer (3) is connected to a PLC control board (4), and the PLC control board (4) is connected to a side-pass valve (5) and a vertical valve (6).
2. The high recognition rate RFID underground leak plugging equipment according to claim 1 is characterized in that: The spiral tube (7) is made of non-metallic material.
3. The high recognition rate RFID underground leak plugging equipment according to claim 1 is characterized in that: The spiral tube (7) is formed by bending a hollow tube.
4. The high recognition rate RFID underground leak plugging equipment according to claim 1 is characterized in that: The side-pass valve (5) and the vertical valve (6) both include: Waterproof box (11): a motor (12) is fixedly arranged inside the waterproof box (11), and a valve plate (16) is fixedly arranged on an output shaft (14) of the motor (12); A water-blocking ring (15) is fixedly provided at the connection between the output shaft (14) of the motor (12) and the waterproof box (11).
5. The high recognition rate RFID underground leak plugging equipment according to claim 4 is characterized in that: A mounting plate (13) is fixedly arranged on the top of the waterproof box (11); one end of the mounting plate (13) is fixedly arranged on the top of the waterproof box (11), and the other end is fixedly arranged on the side of the lock unit (12).
6. The high recognition rate RFID underground leak plugging equipment according to claim 4 is characterized in that: The material of the water-isolating ring (15) is rubber.
7. The high recognition rate RFID underground leak plugging equipment according to claim 1 is characterized in that: The waterproof box (11) is made of 304 stainless steel.
8. The high recognition rate RFID underground leak plugging equipment according to claim 4 is characterized in that: The motor (12) is a stepping motor.